The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days and a standard deviation of 12 days. In what range would you expect to find the middle 68% of most pregnancies? Between  and . If you were to draw samples of size 31 from this population, in what range would you expect to find the middle 68% of most averages for the lengths of pregnancies in the sample? Between  and .

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.